Barnabas s



s. GILLESPIEQ Y Ice Implement.

v Patented Mar. 8,1837.

'TED STATES PATENT OFFICE.

BARNABAS S. GILLESPIE, OF NEW YORK, N. Y.

ICE-BREAKER FOR NAVIGATIN Gr FROZEN WATERS.

Specification of Letters Patent No. 138, dated March 8, 1837.

To all whom it may concern Be it known that I, BARNABAS S. GILLES- PIE, formerly of Erie, Pennsylvania, but now of the city of New York, have invented an improvement in machines for breaking ice to keep rivers, bays, and harbors open during the Winter season, called Gillespies Ice-Breaker, which is described as follows, reference being had to the annexed drawing of the same, making part of this specification.

shaft of the boat, propelled by the action of the steam engine.

H arms or timbers extending from the boat to sustain the crank shaft and in which it turns. The shaft is separated in the center to allow the boat to back, or to ,cause one set of hammers to act at a tim independently of each other. It may also be turned by chains and cogged wheels instead of the cranks and connecting rods.

The invention claimed and desired to be secured by Letters Patent consists in The use and application of the jointed hammers or heaters D attached to the revolving shaft B, for breaking the ice, in combination with the circular saws, substantially as above described.

BARNABAS S. GILLESPIE. 

